Image quality analysis Testing for dust in camera module Symptoms and diagnosis

Head Lamp Lens Hard Coat Dust Root Cause

For detecting these kinds of problems, take an image of a uniform white surface and analyse it in full resolution. A good quality PC monitor is preferred for analysis. Search carefully, since finding these defects is not always easy. Figure Effects of dust on optical path is an example image containing easily detectable dust problems. When taking a white image, use uniformly lightened white paper or white wall. One possibility is to use uniform light but in this case make sure that the camera...

Battery information

Note A new battery's full performance is achieved only after two or three complete charge and discharge cycles The battery can be charged and discharged hundreds of times but it will eventually wear out. When the operating time (talk-time and standby time) is noticeably shorter than normal, it is time to buy a new battery. Use only batteries approved by the phone manufacturer and recharge the battery only with the chargers approved by the manufacturer. Unplug the charger when not in use. Do not...

Imokia

Nokia E71 Motherboard Diagram

Quad-band GSM 850 900 1800 1900 WCDMA 900 2100 and 850 1900 and 850 2100 QVGA 2.36 landscape display, Active area 48 x 36 mm, 320x240 resolution, 16M colours Bluetooth 2.0, WLAN, Infrared, microUSB, 2.5 mm AV Up to 10 h 30 min (GSM) Up to 4 h 30 min (WCDMA) Depends on network parameters and phone settings 1. Change 3. Warnings and 4. ESD 5. Care and 6. Battery 7. PCI 8. Spare parts 9. Service 11. Disassembly 12. Disassembly assembly 12.1 A cover 12.2 IHF speaker 12.3 Torque Spare parts view...

Backup battery troubleshooting

Verify that the backup battery G2200 is empty U lt 1V . Switch the phone on. Measure voltage of the battery when the main battery is connected to the phone and the phone is switched on. Wait a few minutes and monitor that the backup battery voltage rises. Switch off the phone, disconnect the main battery and monitor that the voltage of the backup battery decreases. Normal behaviour of the voltage is described in the figures below If the voltage rises and falls quickly, check the back-up battery...

Shaken blurred images

The traditional xenon flash has the advantage of stopping the movement. This is a result of an extremely short and intense light pulse, which makes it possible for a camera to use very short exposure time. Due to the weak output of the LED flash, the exposure time has to be actually increased in the viewfinder mode in total blackness, instead of shortening it. This allows the sensor to integrate longer and collect more light but this also easily creates blurred images if care is not taken. In...